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<a name="Cilk-Plus-C_002fC_002b_002b-Language-Extension-Built_002din-Functions"></a>
<h3 class="section">6.57 Cilk Plus C/C++ Language Extension Built-in Functions</h3>

<p>GCC provides support for the following built-in reduction functions if Cilk Plus
is enabled. Cilk Plus can be enabled using the <samp>-fcilkplus</samp> flag.
</p>
<ul>
<li> <code>__sec_implicit_index</code>
</li><li> <code>__sec_reduce</code>
</li><li> <code>__sec_reduce_add</code>
</li><li> <code>__sec_reduce_all_nonzero</code>
</li><li> <code>__sec_reduce_all_zero</code>
</li><li> <code>__sec_reduce_any_nonzero</code>
</li><li> <code>__sec_reduce_any_zero</code>
</li><li> <code>__sec_reduce_max</code>
</li><li> <code>__sec_reduce_min</code>
</li><li> <code>__sec_reduce_max_ind</code>
</li><li> <code>__sec_reduce_min_ind</code>
</li><li> <code>__sec_reduce_mul</code>
</li><li> <code>__sec_reduce_mutating</code>
</li></ul>

<p>Further details and examples about these built-in functions are described 
in the Cilk Plus language manual which can be found at 
<a href="https://www.cilkplus.org">https://www.cilkplus.org</a>.
</p>



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